class Solution:
    def lengthOfLastWord(self, s: str) -> int:
        last_word_length = 0
        meet_word = False
        for i in range(len(s) - 1, -1, -1):
            ch = ord(s[i])
            if ch >= 65 and ch <= 122:
                meet_word = True
                last_word_length += 1
            elif meet_word:
                break
        return last_word_length
